Method of manufacturing slotted component

Abstract

Apparatuses and methods are implemented for machining a longitudinally extending slot in a bore of a component. The component is gripped in a gripping device of a workholding device. A cutting operation is performed in order to cut the slot in the bore by a cutting tool. The cutting operation forms burred slot edges. The edges are further machined by inserting a deburring device into the bore. Relative angular reciprocation for a limited angle is imparted between the deburring device and the component.

What is claimed is:  
     
       1. A method for machining a longitudinally extending slot in a bore of a component, the bore extending along and about a longitudinal axis, comprising the steps of gripping the component in a gripping means of a workholding device, performing a cutting operation in which the slot is cut in the bore by a cutting tool thereby forming burred slot edges, further machining the edges of the slot by inserting a deburring means into said bore and imparting relative angular reciprocation through a limited angle between said deburring means and the component. 
     
     
       2. A method for machining as claimed in claim  1 , wherein said limited angle is less than 2θ, where: 
       
         
           θ=α+(β/2)−(y/2)  
         
       
       α=an angle, at a center of a sleeve of a sleeve land separating two adjacent sleeve slots,  
       β=an angle at the center of the sleeve of one sleeve slot, and  
       y=an angle at the center of the sleeve of the land on a mandrel.  
     
     
       3. A method for machining an angularly disposed array of parallel longitudinally extending slots in a bore of a component, the bore extending along and about a longitudinal axis, comprising the steps of gripping the component in a gripping means of a workholding device mounted on an indexable workholding spindle, performing a cutting operation in which the array of slots are cut in the bore by a cutting tool thereby forming burred slot edges, further machining the edges of each slot by inserting a deburring means into the bore of the component and imparting relative angular reciprocation between said deburring means and the component whilst the component remains gripped in said gripping means. 
     
     
       4. A method for machining as claimed in claim  3 , wherein said relative angular reciprocation is through a limited angle. 
     
     
       5. A method for machining as claimed in claim  4 , wherein said limited angle is less than 2θ, where: 
       
         
           θ=α+(β/2)−(y/2)  
         
       
       α=an angle, at a center of a sleeve of a sleeve land separating two adjacent sleeve slots,  
       β=an angle at the center of the sleeve of one sleeve slot, and  
       y=an angle at the center of the sleeve of the land on a mandrel.  
     
     
       6. An apparatus for machining an angularly disposed array of parallel longitudinally extending slots in a bore of a component, the bore extending along and about a longitudinal axis, the apparatus including gripping means for gripping the component in a workholding device mounted to an indexable workholding spindle, slotting means for cutting an array of slots within the bore thereby forming burred slot edges, the apparatus comprising: deburring means for machining the edges of each slot by inserting said deburring means into the bore and imparting a relative angular reciprocation between said deburring means and the component whilst the component remains gripped in the gripping means. 
     
     
       7. An apparatus as claimed in claim  6 , wherein the component is a sleeve and the slot is a sleeve slot. 
     
     
       8. An apparatus as claimed in claim  6 , wherein the deburring means is a mandrel extending along and about the longitudinal axis which is rotationally guided by the bore of the component during said relative angular reciprocation, the mandrel incorporating at least two cutting edges, said at least two cutting edges comprising a first cutting edge arranged to deburr a first edge of at least one of the slots during clockwise relative rotation of the mandrel, and a second cutting edge to deburr a second edge of the at least one slot during anticlockwise relative angular rotation of the mandrel. 
     
     
       9. An apparatus as claimed in claim  8  wherein the mandrel is substantially cylindrical and has on an outside surface with a land lying circumferentially between two flutes, said first and second cutting edges disposed along intersecting lines of the land and the two flutes, the land arranged to radially align with and be circumferentially between the sleeve slot immediately prior to said relative angular reciprocation. 
     
     
       10. An apparatus as claimed in claim  9  wherein the first and second cutting edges are substantially parallel to each other and arranged parallel to the longitudinal axis of the substantially cylindrical mandrel. 
     
     
       11. An apparatus as claimed in claim  9  wherein the first and second cutting edges are substantially parallel to each other and arranged skew to the longitudinal axis of the substantially cylindrical mandrel, hence forming a substantially helical land. 
     
     
       12. An apparatus as claimed in claim  9  wherein the first and second cutting edges are non-parallel relative to each other, hence forming a tapered land. 
     
     
       13. A deburring tool for deburring first and second edges of a longitudinally extending slot disposed in a bore of a component, the bore extending along and about a longitudinal axis, said tool adapted to be rotationally guided by said bore, said tool comprising a generally cylindrically-shaped mandrel extending along and about the longitudinal axis, said mandrel incorporating at least two cutting edges extending generally along at least a portion of a length thereof, said at least two cutting edges comprising a first cutting edge arranged to deburr the first edge of the slot during a clockwise relative angular rotation of the mandrel, and a second cutting edge arranged to deburr the second edge of the slot during an anticlockwise relative angular rotation of the mandrel. 
     
     
       14. A deburring tool as claimed in claim  13  wherein the mandrel is substantially cylindrical and has an outside surface with a land lying circumferentially between two flutes, said first and second cutting edges disposed along intersecting lines of the land and the two flutes. 
     
     
       15. A deburring tool as claimed in claim  14  wherein said first and second cutting edges are substantially parallel to each other and arranged parallel to the longitudinal axis of the substantially cylindrical mandrel. 
     
     
       16. A deburring tool as claimed in claim  14  wherein said first and second cutting edges are substantially parallel to each other and arranged skew to the longitudinal axis of the substantially cylindrical mandrel, thereby forming a substantially helical land during use. 
     
     
       17. A deburring tool as claimed in claim  14  wherein the first and second cutting edges are non-parallel relative to each other, thereby forming a tapered land during use.